my dart is 3.5 from the headers and stop at the rear tires. i don't not have tail pipes. i wanted to get a 3.5 x pipe but ran out of money so i used what i had.lol thye ought to work great on my duster.lol it is getting the engine out of the dart as soon as the duster gets done being painted. here is one pic of my dart. thanks Mopar65